ViewSonic G220f-1 Service Manual
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ViewSonic G220f-1 Service Manual

ViewSonic G220f-1 Service Manual

21” digital controlled color monitor
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Service Manual

ViewSonic G220f -1
G220fB -1
Model No. VCDTS23852-1M
VCDTS23852-2M
21" Digital Controlled Color Monitor
(G220f-1_G220fB-1_SM Rev. 1b Mar. 2006)
ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583

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  • Page 1: Service Manual

    Service Manual ViewSonic G220f -1 G220fB -1 Model No. VCDTS23852-1M VCDTS23852-2M 21” Digital Controlled Color Monitor (G220f-1_G220fB-1_SM Rev. 1b Mar. 2006) ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583...

  • Page 2: Revision History

    Further, ViewSonic reserves the right to revise this publication and to make changes from time to time in the contents hereof without obligation of ViewSonic to notify any person of such revision or changes.

  • Page 3: Table Of Contents

    FRONT PANEL FUNCTION CONTROL DESCRIPTION........16 CIRCUIT DESCRIPTION..................19 BLOCK DIAGRAM ....................24 SCHEMATIC DIAGRAMS..................25 ADJUSTING PROCEDURE..................41 TROUBLE SHOOTING FLOW CHART..............51 EXPLODED DIAGRAM AND SPARE PARTS LIST..........57 10. DISASSEMBLY INSTRUTCTION................59 11. PCB LAYOUT DIAGRAMS..................61 12. RECOMMEND SPARE PARTS LIST...............63 ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...

  • Page 4: Precautions And Notices

    PRECAUTIONS AND NOTICES                                                                                                 ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...

  • Page 5: Confidential – Do Not Copy G220F-1_G220Fb

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  • Page 6               E         A#1='  !' '   ; 1                         ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...

  • Page 7: Specifications

    = 0.329±0.015 5000K x = 0.346±0.015 y = 0.359±0.015 Power Input Range AC 90 to 264V, 50/60Hz ± 3Hz ： Power Consumption 115 Watts max. ︰ Degauss both Automatic and Manual ： ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...
  • Page 8 Top Hook Bottom hook Tilt H/V Convergence Degauss H- moiré V- moiré Color ( 9300, 6500 5000 , user color ) Input level Language OSD H-position OSD V-position View meter Memory recall Exit ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...
  • Page 9 FCC Compliance ：FCC Rules and Regulations, Part 15, sub-part J, Class B ︰EN55022, EN55024 DHHS The unit must comply with all applicable radiation limit and labeling and licensing requirement of DHHS Rule 21 CFR Sub-chapter J for X-ray radiation limits. ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...
  • Page 10 ：Positive bright, 0.7Vp-p for full intensity and 0Vp-p for black. d. Impedance ：75 ohms±5% 4.2.3 Sync signal a. Separate H and V sync or composite H+V sync. b. Voltage level ︰Standard TTL c. Input impedance ︰2KΩ d. Polarity ︰Negative or Positive. ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...
  • Page 11 Klein convergence error measurement gauge CM7AG. d. Microscope 10X. Unless otherwise specified, the brightness control must be set at 50%, and adjust contrast control to 33FL measured with 20% video white window pattern. ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...
  • Page 12 High Voltage variance, max. From 1 to 20FL ：1.5mm b. Temperature variance, max. Across op. Range ：2.5mm c. Line voltage, max. Across op. Range ：2mm d. Wavy, Jitter & Noise Viewed at 50cm ：No objectionable. ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...
  • Page 13 ：Active display area except Zone A. 6.17 Purity No perceptible hue variation over the entire visible area when checked with 20FL full white pattern and relative luminance of full red, green and blue pattern. ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...
  • Page 14 No electrical or mechanical damage shall occur after the test. Packaged unit drop The packaged unit shall not sustain any damage when exposed one drop of 46cm each onto one corner, three adjacent edges, and six faces of the package. ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...
  • Page 15 11.4 Outer surface Material ：PC+ABS 94-5V Color ：L*=77.71+/-0.5,a*=-.10+/-0.35,b*=2.4+/-0.50 11.5 Packaging 11.5.1 Carton dimension Height ：627mm Width ：652mm Depth ：746mm 11.5.2 Shipping weight 33.0 11.6 Product accessory a. User’s manual b. Power cord ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...
  • Page 16 APPENDIX A, VIDEO CONNECTOR PIN ASSIGNMENTS Monitor interface signal definition for VGA monitors Green Blue Ground Ground (Red return) Ground (Green return) Ground (Blue return) Ground Ground Hor. Sync Vert. Sync ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...
  • Page 17 ....Vertical Fig. 1 Fig. 2 Fig. 3 ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...

  • Page 18: Viewsonic Corporation

    390mm 290mm Fig. 4 290mm 390mm Fig. 5 290mm 2.0mm 390mm Fig. 6 ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...

  • Page 19: Front Panel Function Control Description

    FRONT PANEL FUNCTION CONTROL DESCRIPTION                   ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...
  • Page 20        !" #    #  !"   $  #% &  %# &'(     )         *    +    #,    *+              *    +           -         #*+#*+   #  # #  #. # # # ,#  ,              ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...
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  • Page 22: Circuit Description

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  • Page 23 ?*  G ≤(  *7 ≤8(  *7 ≤8(  *7 H38/F :   F H38/F 4   )  *=82=8) * F 38 4 38 :    )9)   2     ()) ) *   38 2  ))     =8;#+8    38 ;(/  ==8   # ))78: *8  =8     ) * 2 # () ,* 8 )  )*2 G? ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...
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  • Page 26  &   &  328  328?2:4"884  9 ,$"   8 "   )328 7 38 + 7 328 4 :  )     * ,    7& +0328   ,    *+*0+0  ()7*  ) ) #8,88 ) 7  7=82 7  )  =82 ))  328 7   ) *      )  ) 7  ) G))383?(/  ,  -0 3,8:4  7 - )7=,8)7 - &.  G7 ,84 $% 7 - 328 4 &.*   ) )%  ) *)38 8  )) )G  J2, )#   )   ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...
  • Page 27 4     :    ,2 3   38) 3 7  ' #&/C38D 38 3   * 328 "/  328& 3  ,4 '5 6, ) 7 L ()  G ;)6L6,  9)*  9)) 7 )'39))38)'!6, *) )28 928 9838 ,C D38  ()  938 )6  9)* 9)" )) )38 ,9 )38 *  ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...

  • Page 28: Block Diagram

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  • Page 29: Schematic Diagrams

    "   #            #     "          "  #          "  ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...
  • Page 30 ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...
  • Page 31 ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...
  • Page 32 ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...
  • Page 33 !!   $ $! !! !!$ !$! !         ! $  $$ $     %!! %! %! %! %!! %!$ %! ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...
  • Page 34 ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...
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  • Page 36 ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...
  • Page 37 ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...
  • Page 38 ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...
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  • Page 40 ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...
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  • Page 42 ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...
  • Page 43 ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...
  • Page 44 ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...

  • Page 45: Adjusting Procedure

    Discharge of CRT anode should be done only to CRT ground strap﹒ Geometric measurements are assumed to be made along a straight surface with a flat rule or template﹒ ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...
  • Page 46 Picture Centering﹒ 268mm Input mode 1~15 adjust V-position﹐ 290mm H-position such that the picture is centered with the screen﹒ ∣ ∣∣ A - B Picture Bezel ∣ ∣∣ C - D Picture Bezel ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...
  • Page 47 ∣ 1mm (A,B,C,D) Barrel Pincushion / Barrel distortion 3.4.3 Trapezoid and parallelogram distortion trapezoid / parallelogram∣1.5mm﹒ 390mm 357mm 268mm 290mm Picture Trapezoid / Parallelogram distortion 3.4.4 Rotate adjustment﹒ ∣ 268mm 290mm 357mm 390mm ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...
  • Page 48 ” and power switch on﹐the picture should restore to that of factory mode﹒ Focus Adjustment﹒ Apply signal ALL “mE” pattern at 1280*1024 91K mode﹒ Set Brightness 50%﹐Contrast 100%﹒ Set focus control for best focus﹒ ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...
  • Page 49 C﹒ ﹒ ﹒ ﹒ PCB defined﹒ ﹒ ﹒ ﹒ VR4403 Main board﹒ Video Board﹒ ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...
  • Page 50 VLIN : Vertical linearity adjust VLINBAL : Vertical linarity balance adjust VLINBAL VFOCUS HLINEAR VFOCUS : Vertical focus adjust HLINEAR : Horizontal linear adjust HCG : Horizontal Convergence VCG : Vertical Convergence ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...
  • Page 51 Parallel slants vertical edges of the screen image until they are parallel. Top Hook horizontal corner correction at top of picture Bottom Hook horizontal corner correction at bottom of picture H. Convergence horizontal convergence of horizontal R.G.B line ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...
  • Page 52 Input Level displays the voltage level of the video signal. Note: the default selection is 0.7V. Language allows you to choose from among several languages for the menus and control screens: English, French, German, Italian, and Spanish. ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...
  • Page 53 Memory recall returns adjustment to the original factory setting if the display is operating in a factory preset timing mode listed in this user guide. Exception: This control does not affect changes made with the User Color control. ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...
  • Page 54 H/V SYNC Output : Video H/V SYNC Initial data Adjustment Video Pattern Monitor Generator Signal cable Signal cable Read E PROM data Initial data / form monitor Adjust data Write to monitor RS232 ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...

  • Page 55: Trouble Shooting Flow Chart

    TROUBLE SHOOTING FLOW CHART                  ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...
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  • Page 61: Exploded Diagram And Spare Parts List

    9. EXPLODED DIAGRAM AND SPARE PARTS LIST ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...
  • Page 62  )#* #    00 &(   #    !!01   # +  !00  #   !00 " #   ! 00  *  ! "00  + "00 %  00 !    ! 00  # +  !00 ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...

  • Page 63: Disassembly Instrutction

    10. DISASSEMBLY INSTRUCTION ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...
  • Page 64 ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...

  • Page 65: Pcb Layout Diagrams

    11. PCB LAYOUT DIAGRAMS ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...
  • Page 66 ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...

  • Page 67: Recommend Spare Parts List

     :  " ;        !          % &%& &&$%  $$   ;             '     %       *& &  &' ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...
  • Page 68  $  &&*$  &&% !!     %& % & %) !!%     $$ &"&& $   3 $ &&% !!  $ %    %& % & %) !!% %      %     $      %   &   $ ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...
  • Page 69        :$" ;        !          % &%& &&$%  $$   ;           '     %        *& & " ViewSonic Corporation G220f-1_G220fB-1 Confidential – Do Not Copy...
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  • Page 71 * Reader’ s Response* Dear Readers: Thank you in advance for your feedback on our Service Manual, which allows continuous improvement of our products. We would appreciate your completion of the Assessment Matrix below, for return to ViewSonic Corporation. Assessment A.

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